Detachable mount for telescopic gun sights



Jan. 28, 1969v s D N 3,424,420

DETACHABLE MOUNT FOR TELESCOPIC GUN SIGHTS Filed Oct. 16, 1967 l N VENI1 1 1. m ABE SE/DERMHA/ I 7 M/M 147' T OR/UE X 3,424,420 DETACHABLEMOUNT FOR TELESCOPIC GUN SIGHTS Abe Seiderman, Coral Gables, Fla. (3740E. 10th Court, Hialeah, Fla. 33013) Filed Oct. 16, 1967, Ser. No.675,548 US. Cl. 248229 10 Claims Int. Cl. F41g 1/38 ABSTRACT OF THEDISCLOSURE This invention relates to firearms and is directedparticularly to novel and improved supporting devices or mounts fordetachably securing telescopic gun sights to guns.

Mounting devices for removably attaching tubular telescopic gun sightsto the receiver end of a gun barrel are well known and have been usedextensively. Such telescopic mount devices as have heretofore beendevised, however, are deficient in one or more respects, principally inthat they utilize as a clamping means about the barrel of the telescopicsight, a two-clamp structure the elements of which are rigid orsubstantially rigid, secured in place in clamping engagement by means ofinterconnecting machine screws or the like. Since the nominal outerdiameter of telescopic sight barrels of different makes, and even of thesame make, vary from unit to unit, and since no diametrical adjustmentis provided for in such mounts, the sight barrels are more often thannot clamped with uneven pressure about their periphery, with the resultthat the clamp securing means must be tightened with great force toinsure firm gripping action. Such inordinate tightening of the clampstructure on a poorly fitting gun sight barrel not only results inblemishing the barrel at the gripping surface areas where high pressureis being applied by the clamp members, but also can effect out-ofrounddistortion at such areas.

It is, accordingly, the principal object of this invention to provide anovel and improved detachable mount for telescopic gun sights whichobviates the above-described deficiencies characteristic of gun sightmounts heretofore devised.

It is a more particular object of the invention to provide a telescopicgun sight mount the barrel clamping mechanism of which is comprised of apair of relatively movable bottom clamp members having substantiallyquarter-round surface areas for seating and clampingly engaging theunderside of a sight barrel, and a substantially semicircular, resilientsaddle member the ends of which are hookingly interengaged withdiametrically-opposed end portion of the bottom clamp members andoperative to be radially retracted upon relative inward adjustment ofthe bottom clamp members for effecting substantiallyuniformly-distributed compressional force about the periphery of atelescopic sight barrel.

Still another object of the invention is to provide a detachable mountof the character described which will be simple in construction, readilyadaptable to use with States Patent F 3,424,420 Patented Jan. 28, 1969mounting bases of various designs, foolproof in operation and durable inuse.

Other objects features and advantages of the invention will be apparentfrom the following description when read with reference to theaccompanying drawings. In the drawings, wherein like reference numeralsdenote corresponding parts throughout the several views:

FIG. 1 illustrates, in side elevation, a gun equipped with a telescopicsight secured by sight mounts embodying the invention;

FIG. 2 illustrates, in front elevation, a preferred form of sight mountembodying the invention, shown attached to a typical sight mount base;

FIG. 3 is a side elevational view of the sight mount shown in FIG. 2, asseen from the left side thereof with respect to FIG. 2;

FIG. 4 is a bottom view of the sight mount shown in FIGS. 2 and 3, shownwithout the associated attachment base and partly in section toillustrate constructional details;

FIG. 5 illustrates separately, in top view, a typical sight mount baseused for connecting the sight mount to the receiver of a gun;

FIG. 6 is .a vertical cross-sectional view taken along the line 6-6 ofFIG. 2 in the direction of the arrows;

FIG. 7 is a side elevational view of a modified form of gun sight mountembodying the invention, shown attached to a typical sight mount base;

FIG. 8 is a bottom view thereof, shown separately and with portionsbroken away to illustrate internal srtuctu-re;

FIG. 9 is a side elevational view of the sight mount shown in FIG. 7, asseen from the opposite side thereof; and

FIG. 10 is a vertical cross-sectional view taken along the line 1010 ofFIG. 9 in the direction of the arrow and illustrating constructiondetails thereof.

Referring now in detail to the drawings, G designates a gun having abarrel B to the receiver end of which are affixed a pair oflongitudinally-spaced, detachable sight mounts embodying the invention,generally indicated by reference numerals 10, shown mounting atelescopic sight T. As illustrated in FIGS. 2 and 3, each sight mount 10comprises a pair of opposed bottom clamp members 11,

12 and an arouate saddle member 13.

As illustrated in FIGS. 2 and 3, and as hereinafter more particularlydescribed, the sight mounts 10 are customarily used in pairs spacedalong the receiver end of the gun barrel, (see FIG. 1), and are adaptedto be clampingly and detachably fixed with respect to mount base memberssuch as are represented at 14 in FIGS. 2, 3 and 5, fixed as by machinescrews 15a extending through base openings 15 and threaded into the gunbarrel at the receiver end. As best illustrated in FIGS. 2 and 5, themount base member 14 may be square or rectangular in shape, and formedalong opposed slides extending longitudinally of the gun barrel withbeveled, upwardly and outwardly divergent side wall portions orundercuts 16, 16 for clamping engagement therewith of sight mountsembodying the invention, as is hereinbelow more particularly described.

The bottom clamp member 11, which is preferably fabricated of anodizedaluminum, comprises a body portion 17 having a vertical, outer side wall18 and a recessed, horizontal bottom wall 19 the inner end of whichextends into an inner vertical wall 20 and the outer end of whichextends downwardly and inwardly into a recessed or undercut portion 21of such angular cross-sectional shape along its length as to receivecomplementary fitted therein the angular projecting side wall portions16 of a mount base member 14 (see FIG. 2). The upper end of the verticalwall 20 of the clamp member body portion 17 extends into an upwardly andoutwardly-extending arcuate wall portion 22 which, as illustrated inFIG. 2, is substantially quarter-round in cross section along itslength. The upper end of the arcuate wall portion 22, along the outsidethereof, is formed along its length with an undercut or recess defininga downwardly and slightly inwardlydirected inclined shoulder 23 alongthe length thereof adapted for hooking interengagement therewith of thesaddle member 13, as is hereinafter more particularly described.

The bottom clamp member 12 differs in construction from its companionbottom clamp member 11 principally in that its bottom wall 19a extendshorizontally through the vertical outer side wall 18a thereof, therebyeliminating the angular recessed portion or groove 21.

Removable means is provided for clamping the bottom clamp member 12against the angular projecting side wall portion 16 of the mount basemember 14. To this end, as best illustrated in FIGS. 2 and 4, there isprovided an elongated yoke member 24 of shallow, U-shape incross-section, and having along its length an upper, inwardly-projectinglip portion 25 adapted to hookingly interengage a shoulder portion 26formed along the outside of the body portion 17a of the bottom clampmember 12, and having along its length a lower inwardly-projecting lipportion 27 adapted to hook under the lower edge of the pertainingprojecting side wall portion 16 of an associated mount base member 14.As illustrated in FIGS. 2 and 4, the bottom clamp member 11 istransversely drilled and counterbored at a central position thereof, asindicated at 28 in FIG. 4, to receive, frictionfitted therein, a machinescrew 29 having a fluted head 29a.

The machine screw 29 extends through a bore 30 in the companion bottomclamp member 12 and a central opening 31 in the yoke member 24 toreceive a thumb-nut 35b for clamping the mount in place on a mount basemember 14, as i hereinbelow more particularly described. As bestillustrated in FIG. 4, a pair of machine screws 32, 32 extend throughcountersunk bores 33, 33 in the bottom clamp member 11 at each side ofthe screw 29, to be threadingly received in tapped blind openings 34, 34provided in the bottom clamp member 12 for adjustably drawing said clampmembers together upon attachment to the barrel of a telescopic sight.

Considering now the operation of the sight mount illustrated in FIGS. 1through 4, and referring particularly to FIG. 2, the barrel of a gunsight to be mounted will be seated upon the arcuate wall portions of thebottom clamp members 11, 12, after first having removed the arcuate yokemember 13. As illustrated in FIGS. 2, 3 and 6, the yoke member 13 isformed with inwardly-bent end portions 13a, 13a adapted to hookinglyengage under the shoulders 23 of the bottom clamp members 11, 12, andcan be disengaged by axial sliding movement thereof with respect to saidclamp members. After the telescopic sight barrel is seated and thearcuate saddle member 13 is fitted in place, the machine screws 32, 32will be tightened, each a little at a time, alternately, to draw thebottom clamp members 11 and 12 into clamping engagement with theunderside of the telescopic barrel. At the same time, due to theresiliency of the saddle member 13, it will be drawn inwardly about thetop portion of the gun sight barrel to compress it substantiallyuniformly about the periphery of the barrel. It will thus be apparent,as illustrated by the circularly-spaced, radially-extending force arrowsin FIG. 2, that substantially uniform compressional force will beapplied about the barrel of a gun sight where clamped, to insure firmgripping without areas of excessive stress, and with minimum possibilityof marring or otherwise blemishing the surface areas of a telescopicsight being clamped. Once a pair of sight mounts 10 are secured inplace, the assembly can readily be attached to the gun barrel mount basemembers by fitting them in place thereon and clamping them by tighteningthe thumb-nut 35b against the yoke member 24.

The embodiment of the invention illustrated in FIGS. 7 through 10differs from that of FIGS. 1 through 6 in that the central machine screw35 having a fluted end 35a (corresponding to the machine screw 29 inFIG. 4) is fitted with an internally and externally-threaded sleeve nut36, slotted at its outer end (as best seen at 37 in FIG. 9) to enabletightening thereof by the use of a screwdriver or spanner tool. Theinner end of the sleeve nut 36 passes freely through an enlarged opening31a in the yoke member 24 to permit abutting engagement against theoutside of its associated clamp member (see FIG. 10). In this embodimentof the invention the machine screw 35 and its sleeve nut 36 serve todraw the opposed bottom clamp members together when clamping to atelescopic sight barrel. As illustrated in FIG. 8, guide pins 40,press-fitted or otherwise secured within a pair of bores 41 in one ofthe base members at each side of the machine screw 35, fit slidingly inopposed bores 42 of the other of said bottom clamp members. Thethumb-nut 38, diametrically-slotted at its outer end as illustrated at39, is threadingly received over the sleeve nut 36 and serves to clampthe sight mount to a mount base member 14 for example, as in theembodiment of the invention illustrated in FIGS. 1 through 6. It will beapparent that the opertion of the embodiment of the inventionillustrated in FIGS. 7 through 10 is otherwise the same as that for thefirst embodiment shown in FIGS. 1 through 6, described above.

While I have illustrated and described herein only two forms in which myinvention can conveniently be embodied in practice, it is to beunderstood that these forms are presented by way of example only and notin a limiting sense.

What I claim as new and desire to secure by Letters Patent is:

1. A detachable mount for telescopic gun sights comprising, incombination, a pair of relatively movable bottom clamp members havingopposed, facing, arcuate surface areas defining, together, asubstantially semicylindrical inner surface for receiving seated thereona pcripheral portion of a gun sight barrel, a substantiallysemicylindrical, resilient saddle member, releaseable means forattaching the ends of said saddle member with the outer ends of saidbottom clamp members for supporting said saddle member in straddlingrelation with respect thereto, and means for securing said bottom clampmemhas in relatively adjusted positions for securing a gun sight barrelin clamping engagement between said saddle member and said bottom clampmembers.

2. A detachable mount for telescopic gun sights as defined in claim 1,wherein said saddle member attaching means comprises outwardly anddownwardly-directed shoulders formed along the outsides at the outerends of said bottom clamp members, and opposed, inwardly-bent hookportions prvided at the ends of said saddle member for hookingengagement under said shoulders.

3. A detachable mount for telescopic gun sights as defined in claim 1,wherein said means for securing said bottom clamp members in relativelyadjusted position comprises a machine screw extending through alignedopenings in said bottom clamp members and having a first nut threadinglyreceived on an outer end portion thereof.

4. A detachable mount for telescopic gun sights as defined in claim 2including means for attaching said bottom clamp members to a mount basemember.

5. A detachable mount for telescopic sights as defined in claim 4,wherein said mount base member attaching means comprises alongitudinally-extending undercut recess formed along the underside ofone of said bottom clamp members and operative to interfit along oneside of a mount base member, an elongated yoke member having opposed,end-to-end, inwardly-directed lip portions adapted to engage,respcctivtly, a shoulder formed along the outside of the other of saidbase members and the opposite side of a mount base member, and means forclampingly securing said yoke member with respect to said base membersand a mount base member.

6. A detachable mount for telescopic sights as defined in claim 5,wherein said means for securing said bottom clamp members in relativelyadjusted position comprises a machine screw extending through alignedopenings in said bottom clamp members and having a first nut threadinglyreceived on an outer end portion thereof.

7. A detachable mount for telescopic gun sights as defined in claim 5,wherein said yoke member clamping means comprises said machine screw andnut.

8. A detachable mount for telescopic gun sights as defined in claim. 6,wherein said yoke clamping means comprises another machine screwextending through aligned openings in said bottom clamp members and anOpening in said yoke member and having a nut threadingly received on anouter end portion thereof.

9. A detachable mount for telescopic gun sights as defined in claim 6,wherein said clamping means comprises said machine screw and said nut,said nut being in the form of an externally and internally-threadedsleeve nut, and an opening in said yoke member large enough to pass saidsleeve nut.

10. A detachable mount for telescopic gun sights as defined in claim 9including a pair of spaced, parallel locating pins secured in openingsin one of said bottom clamp members and extending slidingly into alignedopenings in the other of said bottom clamp members.

References Cited UNITED STATES PATENTS ROY D; FRAZIER, Primary Examiner.

I. FRANKLIN FOSS, Assistant Examiner.

US. Cl. X.R.

